The influence of geometric factors on the wall shear stress distribution in realistic human coronary arteries

Dissertação apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa para a obtenção do grau de Mestre em Engenharia Biomédica. A presente dissertação foi desenvolvida no Erasmus Medical Center em Roterdão, Holanda

Stochastic modeling of the thermal and catalytic degradation of polyethylene using simultaneous DSC/TG analysis

Dissertação para obtenção do Grau de Mestre em Engenharia Química e Bioquímica

Design of future distribution grids

Dissertação para obtenção do Grau de Mestre em Engenharia Electrotécnica e de Computadores

Predictive analytical and numerical modeling for orthogonal cutting

In this thesis, a predictive analytical and numerical modeling approach for the orthogonal cutting process is proposed to calculate temperature distributions and subsequently, forces and stress distributions. The models proposed include a constitutive model for the material being cut based on the work of Weber, a model for the shear plane based on Merchants model, a model describing the contribution of friction based on Zorev’s approach, a model for the effect of wear on the tool based on the work of Waldorf, and a thermal model based on the works of Komanduri and Hou, with a fraction heat partition for a non-uniform distribution of the heat in the interfaces, but extended to encompass a set of contributions to the global temperature rise of chip, tool and work piece. The models proposed in this work, try to avoid from experimental based values or expressions, and simplifying assumptions or suppositions, as much as possible. On a thermo-physical point of view, the results were affected not only by the mechanical or cutting parameters chosen, but also by their coupling effects, instead of the simplifying way of modeling which is to contemplate only the direct effect of the variation of a parameter. The implementation of these models was performed using the MATLAB environment. Since it was possible to find in the literature all the parameters for AISI 1045 and AISI O2, these materials were used to run the simulations in order to avoid arbitrary assumption.

Iberosuchus et pristichampsus, crocodilians de l’éocène données complémentaires, discussion, distribution stratigraphique

Two eocene ziphodont crocodillans (Ilberosuchus and Pristichampsus) are dealt with. Their distinction seems possible, even with isolated teeth. The association of both in some localities may account for some previous identification difficulties. Geographical and stratigraphical distribution indicated: for Pristichampsus from Germany to Spain, Cuisan to to Upper Lutetian; for Iberosuchus from France to Portugal, lower Lutetian to Bartonian and maybe Ludian.

Soils of the Jurassic formations in the central Algarve; their occurrence, distribution, genesis and site qualities

In the central Algarve different soils have developed dependent on petrography of the parent material, slope position and recent erosion. The general patterns of occurence and distribution of different soils are described. The age of an eutric Nitosol is estimated and the relation between the soil and the parent material is investigated. Some different soils are described as examples with their chemical and physical properties. The water budget of soils is described in general with considerations concerning ground water recharge and run-off as well as in dependence of climate and of different site conditions.

Comments on ‘‘Modeling fractional stochastic systems as non-random fractional dynamics driven Brownian motions

Applied Mathematical Modelling, Vol.33

A new least-squares approach to differintegration modeling

Signal Processing, Vol. 86, nº 10

Bitocast: a hybrid BitTorrent and IP Multicast content distribution solution

Dissertação apresentada para obtenção do Grau de Mestre em Informática, pela Universidade Nova de Lisboa, Faculdade de Ciências e Tecnologia

Zonal distribution of gold and platinium group elements in the Mondunguara deposits Mozambique

The Mondunguara copper mines are situated in mountainous terrain in west-central Mozambique. The mineralization consists of chalcopyrite, pyrrhotite, common pcntlandite, cobaltpentlandite, pyrite and several minor oxides and sulphides in tabular ore bodies deeping steep to the north. Gold was known to occur in small quantities but no systematic sampling and analysis for precious clements was ever done. Mineralogical and geological evidence has shown that the ores are magmatic in origin and were derived from gabbro-peridotitic magma dykes saturated in sulphides when intruded. The ore bodies show a clear zonation. Platinum group elements as well as pure gold are associated with high temperature hexagonal pyrrhotite. This pyrrhotite being of no use is generally discarded to the tailing dumps. Late hydrothermal phases are enriched in native silver, silver tellurides as well as electrum.

A Leishmaniose visceral em Portugal Continental : 1999-2009

RESUMO - As alterações climáticas alteraram a incidência e distribuição mundial de zoonoses, ao modificarem o perfil epidemiológico dos seus vectores. A leishmaniose visceral é reemergente na bacia mediterrânica, sendo o seu impacto real subestimado. Em Portugal, é endémica em três regiões, de declaração obrigatória desde 1948 e o reservatório é o canídeo. O aumento da incidência da doença no cão e a escassez de informação epidemiológica tornou pertinente investigar a realidade nacional. A partir das bases de dados das notificações e dos grupos de diagnósticos homogéneos hospitalares, foram identificados todos os casos e, consultados todos os processos clínicos dos doentes com episódios de internamento nos hospitais do continente entre 1999-2009. Ocorreram 730 internamentos para 375 indivíduos na maioria: homens, eurocaucasianos, com em média, 27 anos e, residência em Lisboa e Vale do Tejo. A sintomatologia e comorbilidades dos doentes vão de encontro ao descrito internacionalmente. A doença foi subnotificada, com uma demora média de 19 dias. A letalidade foi de 5%. A taxa de incidência média do continente foi de 0,294/100000 habitantes, sem padrão de sazonalidade. O corredor endémico de Bortman construído apresentou picos com amplitudes de 2-3 anos. O mapeamento dos doentes evidenciou casos em regiões não endémicas acompanhando a distribuição da leishmaniose canina. Seria pertinente que futuras investigações construíssem uma modelação matemática que confirmasse a tendência do corredor endémico (pico em 2011?) para accionar um sistema de alerta nos Serviços de Saúde. Seria também útil a avaliação das condições geoclimáticas das localidades com casos para evidenciar possíveis similitudes no território. -------ABSTRACT - Climate changed the incidence and worldwide distribution of zoonosis while the epidemiological profile of their vectors was changing. Visceral leishmaniasis is reemerging in the Mediterranean basin and its real impact underestimated. In Portugal, it’s endemic in three regions; the notification occurs since 1948 and dog is the reservoir. The increased incidence of the canines’ disease and the scarcity of epidemiological information relevant investigate the national reality. From Notifications and Homogeneous’ Diagnostics Groups system databases, all cases were identified and also analyze all clinical processes of inpatients’ hospitals in 1999- 2009 in Portugal. 730 admissions occurred for 375 patients. In most they were men, Caucasians, with an average of 27 years and residency in Lisboa e Vale do Tejo. The symptoms and comorbilidades patient go against described internationally. The disease was under notified, with an average delay of 19 days. Lethality was 5%. The incidence rate was 0,294/100000 inhabitants, without seasonality. The endemic’s Bortman corridor presents peak amplitudes of 2-3 years. Mapping patient’s residency shows that cases’ distribution is similar to endemic canine leishmaniasis. It would be appropriate a research to build a mathematical modeling up to confirm the trend of corridor endemic (peak in 2011?), to trigger an alert system for health services. It would also be useful to evaluate the geo-climatics conditions of localities with cases to highlight possible similarities in the territory.

Building information modeling: oportunidades e desafios para projectistas e donos de obra em Portugal

Dissertação apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa para obtenção do grau de Mestre em Engenharia Civil-Perfil de Construção

A calculus for modeling and analyzing conversations in service-oriented computing

Dissertação apresentada para a obtenção do Grau de Doutor em Informática pela Universidade Nova de Lisboa, Faculdade de Ciências e Tecnologia

Investigating habitat association of breeding birds using public domain satellite imagery and land cover data.

Dissertation submitted in partial fulfilment of the requirements for the Degree of Master of Science in Geospatial Technologies

Constraint-based modeling of minimum set covering: application to species differentation

Work presented in the context of the European Master in Computational Logics, as partial requisit for the graduation as Master in Computational Logics